<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/*
 * Project:	 GoogleMapAPI V3: a PHP library inteface to the Google Map API v3
 * File:		GoogleMapV3.php
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * ORIGINAL INFO
 * link http://www.phpinsider.com/php/code/GoogleMapAPI/
 * copyright 2005 New Digital Group, Inc.
 * author Monte Ohrt <monte at ohrt dot com>
 * package GoogleMapAPI
 * version 2.5
 * 
 * REVISION NOTIFICATION
 * NOTE: This is a modified version of the original listed above.  This version
 * maintains all original GNU software licenses.
 */
/**
 * @link http://code.google.com/p/phpgooglemapapiv3/
 * @copyright 2010 Brad wedell
 * @author Brad Wedell
 * @package GoogleMapAPI (version 3)
 * @version 3.0beta
*/
/*
 * To view the full CHANGELOG, visit 
 * http://code.google.com/p/php-google-map-api/wiki/ChangeLog3
/*
For database caching, you will want to use this schema:

CREATE TABLE geocode_cache (
  id int(11) NOT NULL AUTO_INCREMENT PRIMARY KEY,
  lng double NOT NULL,
  lat double NOT NULL,
  query varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL
);

*/

/**
 * PHP Google Maps API class
 * @package GoogleMapAPI
 * @version 3.0beta
 */
class Gmap {

	var $CI = null;
	
	/**
	 * current map id, set when you instantiate
	 * the GoogleMapAPI object.
	 *
	 * @var string
	 */
	var $map_id = null;
	
	/**
	 * determines whether or not to display the map and associated JS on the page
	 * this is used if you just want to display a streetview with no map
	 */
	var $display_map = true;

	/**
	 * sidebar <div> used along with this map.
	 *
	 * @var string
	 */
	var $sidebar_id = null;	
	
	/**
	 * Whether to use new V3 mobile functionality
	 *
	 * @var bool
	 */
	var $mobile=false;
	
	/**
	 * DEPRECATED: Google now has geocoding service.  
	 * NOTE: Note even sure if this still works
	 * GoogleMapAPI used to use the Yahoo geocode lookup API.
	 * This is the application ID for YOUR application.
	 * This is set upon instantiating the GoogleMapAPI object.
	 * (http://developer.yahoo.net/faq/index.html#appid)
	 *
	 * @var string
	 */
	var $app_id = null;

	/**
	 * use onLoad() to load the map javascript.
	 * if enabled, be sure to include on your webpage:
	 * <?=$mapobj->printOnLoad?> or manually create an onload function 
	 * that calls the map's onload function using $this->printOnLoadFunction
	 *
	 * @var bool
	 * @default true
	 */
	var $onload = true;
	
	/**
	 * map center latitude (horizontal)
	 * calculated automatically as markers
	 * are added to the map.
	 *
	 * @var float
	 */
	var $center_lat = null;

	/**
	 * map center longitude (vertical)
	 * calculated automatically as markers
	 * are added to the map.
	 *
	 * @var float
	 */
	var $center_lon = null;
	
	/**
	 * enables map controls (zoom/move/center)
	 *
	 * @var bool
	 */
	var $map_controls = true;

	/**
	 * determines the map control type
	 * small -> show move/center controls
	 * large -> show move/center/zoom controls
	 *
	 * @var string
	 */
	var $control_size = 'large';
	
	/**
	 * enables map type controls (map/satellite/hybrid/terrain)
	 *
	 * @var bool
	 */
	var $type_controls = true;
	
	/**
	 * sets default option for type controls(DEFAULT, HORIZONTAL_BAR, DROPDOWN_MENU)
	 *
	 * @var string
	 */
	 var $type_controls_style = "DEFAULT";

	/**
	 * default map type google.maps.MapTypeId.(ROADMAP, SATELLITE, HYBRID, TERRAIN)
	 *
	 * @var string
	 */
	var $map_type = 'HYBRID';
	
	/**
	 * enables scale map control
	 *
	 * @var bool
	 */
	var $scale_control = true;
	
	/**
	 * enables overview map control
	 *
	 * @var bool
	 */
	var $overview_control = false;
	
	/**
	 * enables Google Adsense Adsmanager on page, not currently supported in beta
	 *
	 * @var bool
	 */
	var $ads_manager = false;
	
	/**
	 * Google Adsense Publisher ID
	 *
	 * @var string
	 */
	var $ads_pub_id = "";  
	
	/**
	 * Google Adsense Channel ID
	 *
	 * @var string
	 */
	var $ads_channel = "";
	
	/**
	 * The Max number of Adsmanager ads to show on a map
	 *
	 * @var int
	 */
	var $ads_max = 10;
	
	/**
	 * enables/disables local search on page
	 *
	 * @var bool
	 */
	var $local_search = false;
	
	/**
	 * enables local search ads on page NOTE: will only display ads if local_search == true, otherwise just use ad_manager and settings.
	 *
	 * @var bool
	 */
	var $local_search_ads = false;
	
	/**
	 * enables/disables walking directions option
	 *
	 * @var bool
	 */
	var $walking_directions = false;
	
	/**
	 * enables/disables biking directions on directions
	 *
	 * @var bool
	 */
	var $biking_directions = false;
	
	/**
	 * enables/disables avoid highways on directions
	 *
	 * @var bool
	 */
	var $avoid_highways = false;
	
	/**
	 * determines if avoid tollways is used in directions
	 *
	 * @var bool
	 */
	var $avoid_tollways = false;	
	 
	/**
	 * determines the default zoom level
	 *
	 * @var int
	 */
	var $zoom = 16;

	/**
	 * determines the map width
	 *
	 * @var string
	 */
	var $width = '500px';
	
	/**
	 * determines the map height
	 *
	 * @var string
	 */
	var $height = '500px';

	/**
	 * message that pops up when the browser is incompatible with Google Maps.
	 * set to empty string to disable.
	 *
	 * @var string
	 */
	var $browser_alert = 'Sorry, the Google Maps API is not compatible with this browser.';
	
	/**
	 * message that appears when javascript is disabled.
	 * set to empty string to disable.
	 *
	 * @var string
	 */
	var $js_alert = '<b>Javascript must be enabled in order to use Google Maps.</b>';

	/**
	 * determines if sidebar is enabled
	 *
	 * @var bool
	 */
	var $sidebar = true;	

	/**
	 * determines if to/from directions are included inside info window
	 * 
	 * @var bool
	 * @deprecated
	 */
	var $directions = true;

	/**
	 * determines if map markers bring up an info window
	 *
	 * @var bool
	 */
	var $info_window = true;	
	
	/**
	 * determines if info window appears with a click or mouseover
	 *
	 * @var string click/mouseover
	 */
	var $window_trigger = 'click';	
	
	/**
	 * determines whether or not to use the MarkerClusterer plugin
	 */
	 var $marker_clusterer = false;
	 
	 /**
	 * set default marker clusterer *webserver* file location
	 */
	 var $marker_clusterer_location = "/MarkerClusterer-1.0/markerclusterer_compiled.js";
	 
	 /**
	 * set default marker clusterer options
	 */
	 var $marker_clusterer_options = array(
	 	"maxZoom"=>"null",
		"gridSize"=>"null",
		"styles"=>"null"
	 );
	
	/**
	 * determines if traffic overlay is displayed on map
	 *
	 * @var bool
	 */
	var $traffic_overlay = false;
	
	/**
	 * determines if biking overlay is displayed on map
	 *
	 * @var bool
	 */
	var $biking_overlay = false;	
	
	/**
	 * determines whether or not to display street view controls
	 */
	var $street_view_controls = false;
	
	/**
	 * ID of the container that will hold a street view if streetview controls = true.
	 */
	var $street_view_dom_id = "";
	
	/**
	 * what server geocode lookups come from
	 *
	 * available: YAHOO  Yahoo! API. US geocode lookups only.
	 *			GOOGLE Google Maps. This can do international lookups,
	 *					but not an official API service so no guarantees.
	 *			Note: GOOGLE is the default lookup service, please read
	 *				  the Yahoo! terms of service before using their API.
	 *
	 * @var string service name
	 */
	var $lookup_service = 'GOOGLE';
	var $lookup_server = array('GOOGLE' => 'maps.google.com', 'YAHOO' => 'api.local.yahoo.com');
	
	/**
	 * 
	 * @var array
	 * @deprecated
	 */
	var $driving_dir_text = array(
			'dir_to' => 'Start address: (include addr, city st/region)',
			'to_button_value' => 'Get Directions',
			'to_button_type' => 'submit',
			'dir_from' => 'End address: (include addr, city st/region)',
			'from_button_value' => 'Get Directions',
			'from_button_type' => 'submit',
			'dir_text' => 'Directions: ',
			'dir_tohere' => 'To here',
			'dir_fromhere' => 'From here'
			);			 
				
	
	/**
	 * version number
	 *
	 * @var string
	 */
	var $_version = '3.0beta';

	/**
	 * list of added markers
	 *
	 * @var array
	 */
	var $_markers = array();
	
	/**
	 * maximum longitude of all markers
	 * 
	 * @var float
	 */
	var $_max_lon = -1000000;
	
	/**
	 * minimum longitude of all markers
	 *
	 * @var float
	 */
	var $_min_lon = 1000000;
	
	/**
	 * max latitude
	 *
	 * @var float
	 */
	var $_max_lat = -1000000;
	
	/**
	 * min latitude
	 *
	 * @var float
	 */
	var $_min_lat = 1000000;
	
	/**
	 * determines if we should zoom to minimum level (above this->zoom value) that will encompass all markers
	 *
	 * @var bool
	 */
	var $zoom_encompass = true;

	/**
	 * factor by which to fudge the boundaries so that when we zoom encompass, the markers aren't too close to the edge
	 *
	 * @var float
	 */
	var $bounds_fudge = 0.01;

	/**
	 * use the first suggestion by a google lookup if exact match not found
	 *
	 * @var float
	 */
	var $use_suggest = false;

	
	/**
	 * list of added polylines
	 *
	 * @var array
	 */
	var $_polylines = array();
	
	/**
	 * list of polylines that should have an elevation profile rendered.
	 */
	var $_elevation_polylines = array();
	
	/**
	 * determines whether or not to display a marker on the "line" when 
	 * mousing over the elevation chart
	 */
	var $elevation_markers = true;
	
	/**
	 * determines whether or not to display an elevation chart 
	 * for directions that are added to the map.  
	 */
	var $elevation_directions = false;
		
	/**
	 * icon info array
	 *
	 * @var array
	 * @deprecated
	 * @version 2.5  
	 */
	var $_icons = array();  
		
	/**
	 * marker icon info array
	 *
	 * @var array
	 * @version 3.0
	 */
	var $_marker_icons = array();
	
	/**
	 * Default icon image location.
	 *
	 * @var string
	 */
	var $default_icon = "";
	
	/**
	 * Default icon shadow image location.
	 *
	 * @var string
	 */
	var $default_icon_shadow = "";
	
	/**
	 * list of added overlays
	 *
	 * @var array
	 */
	var $_overlays = array();
	
	/**
	 * list of added kml overlays
	 */
	var $_kml_overlays = array();
		

	/**
	 * database cache table name
	 *
	 * @var string
	 */
	var $_db_cache_table = 'geocode_cache';
	
	/**
	 * Class variable that will store generated header code for JS to display directions
	 *
	 * @var string
	 */
	var $_directions_header = '';
	
	/**
	 * Class variable that will store information to render directions
	 */
	var $_directions = array();
	
	/**
	 * Class variable to store whether or not to display JS functions in the header
	 */
	var $_display_js_functions = true;
	
	/**
	 * Class variable that will store flag to minify js - this can be overwritten after object is instantiated.  Include JSMin.php if 
	 * you want to use JS Minification.
	 *
	 * @var bool
	 */
	 var $_minify_js = true;
		
	/**
	 * class constructor
	 *
	 * @param string $map_id the DOM element ID for the map
	 * @param string $app_id YOUR Yahoo App ID
	 */
	function GoogleMapAPI($map_id = 'map', $app_id = 'MyMapApp') {
		$this->map_id = $map_id;
		$this->sidebar_id = 'sidebar_' . $map_id;
		$this->app_id = $app_id;
	}
	
	/**
	 * function to enable map display
	 */
	function enableMapDisplay(){
		$this->display_map = true;
	}
	
	/**
	 * function to disable map display (used to display street view only)
	 */
	function disableMapDisplay(){
		$this->display_map = true;
	}
	
	/**
	 * sets the width of the map
	 *
	 * @param string $width
	 * @return string|false Width or false if not a valid value
	 */
	function setWidth($width) {
		if(!preg_match('!^(\d+)(.*)$!',$width,$_match))
			return false;

		$_width = $_match[1];
		$_type = $_match[2];
		if($_type == '%')
			$this->width = $_width . '%';
		else
			$this->width = $_width . 'px';
		
		return true;
	}

	/**
	 * sets the height of the map
	 *
	 * @param string $height
	 * @return string|false Height or false if not a valid value
	 */
	function setHeight($height) {
		if(!preg_match('!^(\d+)(.*)$!',$height,$_match))
			return false;

		$_height = $_match[1];
		$_type = $_match[2];
		if($_type == '%')
			$this->height = $_height . '%';
		else
			$this->height = $_height . 'px';
		
		return true;
	}  
		  

	/**
	 * sets the default map zoom level
	 *
	 * @param string $level Initial zoom level value
	 */
	function setZoomLevel($level) {
		$this->zoom = (int) $level;
	}	
			
	/**
	 * enables the map controls (zoom/move)
	 *
	 */
	function enableMapControls() {
		$this->map_controls = true;
	}

	/**
	 * disables the map controls (zoom/move)
	 *
	 */
	function disableMapControls() {
		$this->map_controls = false;
	} 
	
	/**
	 * sets the map control size (large/small)
	 *
	 * @param string $size Large/Small
	 */
	function setControlSize($size) {
		if(in_array($size,array('large','small')))
			$this->control_size = $size;
	}			

	 /**
	 * enables the type controls (map/satellite/hybrid)
	 *
	 */
	function enableLocalSearch() {
		$this->local_search = true;
	}

	/**
	 * disables the type controls (map/satellite/hybrid)
	 *
	 */
	function disableLocalSearch() {
		$this->local_search = false;
	}
	
	/**
	 * enables the type controls (map/satellite/hybrid)
	 *
	 */
	function enableLocalSearchAds() {
		$this->local_search_ads = true;
	}

	/**
	 * disables the type controls (map/satellite/hybrid)
	 *
	 */
	function disableLocalSearchAds() {
		$this->local_search_ads = false;
	}
	
	/**
	 * enables walking directions
	 * 
	 */
	function enableWalkingDirections() {
		$this->walking_directions = true;
	}

	/**
	 * disables walking directions
	 * 
	 */
	function disableWalkingDirections() {
		$this->walking_directions = false;
	}
	
	/**
	 * enables biking directions
	 * 
	 */
	function enableBikingDirections() {
		$this->biking_directions = true;
	}

	/**
	 * disables biking directions
	 * 
	 */
	function disableBikingDirections() {
		$this->biking_directions = false;
	}
	
	/**
	 * enables avoid highways in directions
	 * 
	 */
	function enableAvoidHighways() {
		$this->avoid_highways = true;
	}

	/**
	 * disables avoid highways in directions
	 * 
	 */
	function disableAvoidHighways() {
		$this->avoid_highways = false;
	}
	
	/**
	 * enables avoid tolls in directions
	 * 
	 */
	function enableAvoidTolls() {
		$this->avoid_tolls = true;
	}

	/**
	 * disables avoid tolls in directions
	 * 
	 */
	function disableAvoidTolls() {
		$this->avoid_tolls = false;
	}
	
	/**
	 * Add directions route to the map and adds text directions container with id=$dom_id
	 *
	 * @param string $start_address
	 * @param string $dest_address
	 * @param string $dom_id DOM Element ID for directions container.
	 * @param bool $add_markers Add a marker at start and dest locations.
	 */
	function addDirections($start_address='',$dest_address='',$dom_id='', $add_markers=true, $elevation_samples=256, $elevation_width="", $elevation_height="", $elevation_dom_id=''){
		if($elevation_dom_id=="")
			$elevation_dom_id = "elevation".$dom_id;
		
		if($start_address != '' && $dest_address != '' && $dom_id != ''){
			$this->_directions[$dom_id] = array(
				"dom_id"=>$dom_id,
				"start"=>$start_address,
				"dest"=>$dest_address,
				"markers"=>true,
				"elevation_samples"=>$elevation_samples,
				"width"=>($elevation_width!=""?$elevation_width:str_replace("px","",$this->width)),
				"height"=>($elevation_height!=""?$elevation_height:str_replace("px","",$this->height)/2),
				"elevation_dom_id"=>$elevation_dom_id
			);			
			if($add_markers==true){
				$this->addMarkerByAddress($start_address,$start_address, $start_address);
				$this->addMarkerByAddress($dest_address,$dest_address, $dest_address);
			} 
		}
	}
		
	/**
	 * enables the type controls (map/satellite/hybrid)
	 *
	 */
	function enableTypeControls() {
		$this->type_controls = true;
	}

	/**
	 * disables the type controls (map/satellite/hybrid)
	 *
	 */
	function disableTypeControls() {
		$this->type_controls = false;
	}
	
	/**
	 * sets map control style
	 */
	function setTypeControlsStyle($type){
		switch($type){
			case "dropdown":
				$this->type_controls_style = "DROPDOWN_MENU";
				break;
			case "horizontal":
				$this->type_controls_style = "HORIZONTAL_BAR";
				break;
			default:
				$this->type_controls_style = "DEFAULT";
				break;
		}
	}
	
	/**
	 * set default map type (map/satellite/hybrid)
	 *
	 * @param string $type New V3 Map Types, only include ending word (HYBRID,SATELLITE,TERRAIN,ROADMAP)
	 */
	function setMapType($type) {
		switch($type) {
			case 'hybrid':
				$this->map_type = 'HYBRID';
				break;
			case 'satellite':
				$this->map_type = 'SATELLITE';
				break;
			case 'terrain':
				$this->map_type = 'TERRAIN';
				break;
			case 'map':
			default:
				$this->map_type = 'ROADMAP';
				break;
		}		
	}		
		
	/**
	 * enables onload
	 *
	 */
	function enableOnLoad() {
		$this->onload = true;
	}

	/**
	 * disables onload
	 *
	 */
	function disableOnLoad() {
		$this->onload = false;
	}
	
	/**
	 * enables sidebar
	 *
	 */
	function enableSidebar() {
		$this->sidebar = true;
	}

	/**
	 * disables sidebar
	 *
	 */
	function disableSidebar() {
		$this->sidebar = false;
	}	

	/**
	 * enables map directions inside info window
	 *
	 */
	function enableDirections() {
		$this->directions = true;
	}

	/**
	 * disables map directions inside info window
	 *
	 */
	function disableDirections() {
		$this->directions = false;
	}	
		
	/**
	 * set browser alert message for incompatible browsers
	 *
	 * @param string $message
	 */
	function setBrowserAlert($message) {
		$this->browser_alert = $message;
	}

	/**
	 * set <noscript> message when javascript is disabled
	 *
	 * @param string $message
	 */
	function setJSAlert($message) {
		$this->js_alert = $message;
	}
	
	/**
	 * enable traffic overlay 
	 */
	function enableTrafficOverlay() {
		$this->traffic_overlay= true;
	}
	
	/**
	 * disable traffic overlay (default)
	 */
	function disableTrafficOverlay() {
		$this->traffic_overlay= false;
	}
	
	/**
	 * enable biking overlay 
	 */
	function enableBikingOverlay() {
		$this->biking_overlay= true;
	}
	
	/**
	 * disable biking overlay (default)
	 */
	function disableBikingOverlay() {
		$this->biking_overlay= false;
	}
	
	/**
	 * enable biking overlay 
	 */
	function enableStreetViewControls() {
		$this->street_view_controls= true;
	}
	
	/**
	 * disable biking overlay (default)
	 */
	function disableStreetViewControls() {
		$this->street_view_controls= false;
	}
	
	/**
	 * attach a dom id object as a streetview container to the map
	 * NOTE: Only one container can be attached to a map.
	 **/
	function attachStreetViewContainer($dom_id){
		$this->street_view_dom_id = $dom_id;
	}
	
	/**
	 * enable Google Adsense admanager on Map (not supported in V3 API)
	 */
	function enableAds(){
		$this->ads_manager = true; 
	}
	
	/**
	 * disable Google Adsense admanager on Map (not supported in V3 API)
	 */
	function disableAds(){
		$this->ads_manager = false; 
	}
	

	/**
	 * enable map marker info windows
	 */
	function enableInfoWindow() {
		$this->info_window = true;
	}
	
	/**
	 * disable map marker info windows
	 */
	function disableInfoWindow() {
		$this->info_window = false;
	}
	
	/**
	 * enable elevation marker to be displayed
	 */
	 function enableElevationMarker(){
		 $this->elevation_markers = true;
	 }
	 
	 /**
	 * disable elevation marker
	 */
	 function disableElevationMarker(){
		 $this->elevation_markers = false;
	 }
	 
	 /**
	 * enable elevation to be displayed for directions
	 */
	 function enableElevationDirections(){
		 $this->elevation_directions = true;
	 }
	 
	 /**
	 * disable elevation to be displayed for directions
	 */
	 function disableElevationDirections(){
		 $this->elevation_directions = false;
	 }
	
	/**
	 * enable map marker clustering
	 */
	function enableClustering() {
		$this->marker_clusterer = true;
	}
	
	/**
	 * disable map marker clustering
	 */
	function disableClustering() {
		$this->marker_clusterer = false;
	}
	
	/**
	 * set clustering options
	 */
	function setClusterOptions($zoom="null", $gridsize="null", $styles="null"){
		$this->marker_clusterer_options["maxZoom"]=$zoom;
		$this->marker_clusterer_options["gridSize"]=$gridsize;
		$this->marker_clusterer_options["styles"]=$styles;
	}	

	/**
	 * Set clustering library file location
	 */
	function setClusterLocation($file){
		$this->marker_clusterer_location=$file;
	}
	
	/**
	 * set the info window trigger action
	 *
	 * @param string $message click/mouseover
	 */
	function setInfoWindowTrigger($type) {
		switch($type) {
			case 'mouseover':
				$this->window_trigger = 'mouseover';
				break;
			default:
				$this->window_trigger = 'click';
				break;
			}
	}

	/**
	 * enable zoom to encompass makers
	 */
	function enableZoomEncompass() {
		$this->zoom_encompass = true;
	}
	
	/**
	 * disable zoom to encompass makers
	 */
	function disableZoomEncompass() {
		$this->zoom_encompass = false;
	}

	/**
	 * set the boundary fudge factor
	 * @param float
	 */
	function setBoundsFudge($val) {
		$this->bounds_fudge = $val;
	}
	
	/**
	 * enables the scale map control
	 *
	 */
	function enableScaleControl() {
		$this->scale_control = true;
	}

	/**
	 * disables the scale map control
	 *
	 */
	function disableScaleControl() {
		$this->scale_control = false;
	}	
			
	/**
	 * enables the overview map control
	 *
	 */
	function enableOverviewControl() {
		$this->overview_control = true;
	}

	/**
	 * disables the overview map control
	 *
	 */
	function disableOverviewControl() {
		$this->overview_control = false;
	 }	
	
	
	/**
	 * set the lookup service to use for geocode lookups
	 * default is YAHOO, you can also use GOOGLE.
	 * NOTE: GOOGLE can to intl lookups, but is not an
	 * official API, so use at your own risk.
	 *
	 * @param string $service
	 * @deprecated
	 */
	function setLookupService($service) {
		switch($service) {
			case 'GOOGLE':
				$this->lookup_service = 'GOOGLE';
				break;
			case 'YAHOO':
			default:
				$this->lookup_service = 'YAHOO';
				break;
		}		
	}
	
		
	/**
	 * adds a map marker by address - DEPRECATION WARNING: Tabs are no longer supported in V3, if this changes this can be easily updated.
	 * 
	 * @param string $address the map address to mark (street/city/state/zip)
	 * @param string $title the title display in the sidebar
	 * @param string $html the HTML block to display in the info bubble (if empty, title is used)
	 * @param string $tooltip Tooltip to display (deprecated?)
	 * @param string $icon_filename Web file location (eg http://somesite/someicon.gif) to use for icon
	 * @param string $icon_shadow_filename Web file location (eg http://somesite/someicon.gif) to use for icon shadow
	 * @return int|bool
	 */
	function addMarkerByAddress($address,$title = '',$html = '',$tooltip = '', $icon_filename = '', $icon_shadow_filename='') {
		if(($_geocode = $this->getGeocode($address)) === false)
			return false;
		return $this->addMarkerByCoords($_geocode['lon'],$_geocode['lat'],$title,$html,$tooltip, $icon_filename, $icon_shadow_filename);
	}

	/**
	 * adds a map marker by lat/lng coordinates - DEPRECATION WARNING: Tabs are no longer supported in V3, if this changes this can be easily updated.
	 * 
	 * @param string $lon the map longitude (horizontal)
	 * @param string $lat the map latitude (vertical)
	 * @param string $title the title display in the sidebar
	 * @param string $html the HTML block to display in the info bubble (if empty, title is used)
	 * @param string $tooltip Tooltip to display (deprecated?)
	 * @param string $icon_filename Web file location (eg http://somesite/someicon.gif) to use for icon
	 * @param string $icon_shadow_filename Web file location (eg http://somesite/someicon.gif) to use for icon shadow
	 * @return int|bool	
	 */
	function addMarkerByCoords($lon,$lat,$title = '',$html = '',$tooltip = '', $icon_filename = '', $icon_shadow_filename='') {
		$_marker['lon'] = $lon;
		$_marker['lat'] = $lat;
		$_marker['html'] = (is_array($html) || strlen($html) > 0) ? $html : $title;
		$_marker['title'] = $title;
		$_marker['tooltip'] = $tooltip;
		
		if($icon_filename!=""){
			$_marker['icon_key'] = $this->setMarkerIconKey($icon_filename, $icon_shadow_filename);
			if($icon_shadow_filename!=""){
				$_marker['shadow_icon']=1;
			}	
		}else if( $this->default_icon != ''){
			$_marker['icon_key'] = $this->setMarkerIconKey($this->default_icon, $this->default_icon_shadow);
			if($this->default_icon_shadow!=""){
				$_marker['shadow_icon']=1;
			}
		}		
		$this->_markers[] = $_marker;
		$this->adjustCenterCoords($_marker['lon'],$_marker['lat']);
		// return index of marker
		return count($this->_markers) - 1;
	}
	
	/**
	 * adds a DOM object ID to specified marker to open the marker's info window.
	 *	Does nothing if the info windows is disabled.
	 * @param string $marker_id ID of the marker to associate to
	 * @param string $dom_id ID of the DOM object to use to open marker info window
	 * @return bool true/false status
	 */
	function addMarkerOpener($marker_id, $dom_id){
		if($this->info_window === false || !isset($this->_markers[$marker_id]))
			return false;
		if(!isset($this->_markers[$marker_id]["openers"]))
			$this->_markers[$marker_id]["openers"] = array();
		$this->_markers[$marker_id]["openers"][] = $dom_id;			
	}
	
	/**
	 * adds polyline by passed array
	 * if color, weight and opacity are not defined, use the google maps defaults
	 * @param array $polyline_array array of lat/long coords
	 * @param string $id An array id to use to append coordinates to a line
	 * @param string $color the color of the line (format: #000000)
	 * @param string $weight the weight of the line in pixels
	 * @param string $opacity the line opacity (percentage)
	 * @return bool|int Array id of newly added point or false
	 */
	function addPolylineByCoordsArray($polyline_array,$id=false,$color='',$weight=0,$opacity=0){
		if(!is_array($polyline_array) || sizeof($polyline_array) < 2)
			return false;
		$_prev_coords = "";
		$_next_coords = "";
		
		foreach($polyline_array as $_coords){
			$_prev_coords = $_next_coords;
			$_next_coords = $_coords;
			
			if($_prev_coords !== ""){
			  $_lt1=$_prev_coords["lat"];
			  $_ln1=$_prev_coords["long"];
			  $_lt2=$_next_coords["lat"];
			  $_ln2=$_next_coords["long"];
			  $id = $this->addPolyLineByCoords($_ln1, $_lt1, $_ln2, $_lt2, $id, $color, $weight, $opacity);
			}
		}
		return $id;
	}
	
	/**
	 * adds polyline by passed array
	 * if color, weight and opacity are not defined, use the google maps defaults
	 * @param array $polyline_array array of addresses
	 * @param string $id An array id to use to append coordinates to a line
	 * @param string $color the color of the line (format: #000000)
	 * @param string $weight the weight of the line in pixels
	 * @param string $opacity the line opacity (percentage)
	 * @return bool|int Array id of newly added point or false
	 */
	function addPolylineByAddressArray($polyline_array,$id=false,$color='',$weight=0,$opacity=0){
		if(!is_array($polyline_array) || sizeof($polyline_array) < 2)
			return false;
		$_prev_address = "";
		$_next_address = "";
		
		foreach($polyline_array as $_address){
			$_prev_address = $_next_address;
			$_next_address = $_address;
			
			if($_prev_address !== ""){
			  $id = $this->addPolyLineByAddress($_prev_address, $_next_address, $id, $color, $weight, $opacity);
			}
		}
		return $id;
	}

	/**
	 * adds a map polyline by address
	 * if color, weight and opacity are not defined, use the google maps defaults
	 * 
	 * @param string $address1 the map address to draw from
	 * @param string $address2 the map address to draw to
	 * @param string $id An array id to use to append coordinates to a line
	 * @param string $color the color of the line (format: #000000)
	 * @param string $weight the weight of the line in pixels
	 * @param string $opacity the line opacity (percentage)
	 * @return bool|int Array id of newly added point or false
	 */
	function addPolyLineByAddress($address1,$address2,$id=false,$color='',$weight=0,$opacity=0) {
		if(($_geocode1 = $this->getGeocode($address1)) === false)
			return false;
		if(($_geocode2 = $this->getGeocode($address2)) === false)
			return false;
		return $this->addPolyLineByCoords($_geocode1['lon'],$_geocode1['lat'],$_geocode2['lon'],$_geocode2['lat'],$id,$color,$weight,$opacity);
	}

	/**
	 * adds a map polyline by map coordinates
	 * if color, weight and opacity are not defined, use the google maps defaults
	 * 
	 * @param string $lon1 the map longitude to draw from
	 * @param string $lat1 the map latitude to draw from
	 * @param string $lon2 the map longitude to draw to
	 * @param string $lat2 the map latitude to draw to
	 * @param string $id An array id to use to append coordinates to a line
	 * @param string $color the color of the line (format: #000000)
	 * @param string $weight the weight of the line in pixels
	 * @param string $opacity the line opacity (percentage)
	 * @return string $id id of the created/updated polyline array
	 */
	function addPolyLineByCoords($lon1,$lat1,$lon2,$lat2,$id=false,$color='',$weight=0,$opacity=0) {
		if($id !== false && isset($this->_polylines[$id]) && is_array($this->_polylines[$id])){
			$_polyline = $this->_polylines[$id];
		}else{
			//only set color,weight,and opacity if new polyline
			$_polyline = array(
				"color"=>$color,
				"weight"=>$weight,
				"opacity"=>$opacity
			);
		}
		if(!isset($_polyline['coords']) || !is_array($_polyline['coords'])){
			$_polyline['coords'] = array(
				"0"=> array("lat"=>$lat1, "long"=>$lon1),
				"1"=> array("lat"=>$lat2, "long"=>$lon2)
			);
		}else{
			$last_index = sizeof($_polyline['coords'])-1;
			//check if lat1/lon1 point is already on polyline
			if($_polyline['coords'][$last_index]["lat"] != $lat1 || $_polyline['coords'][$last_index]["long"]  != $lon1){
				$_polyline['coords'][] = array("lat"=>$lat1, "long"=>$lon1);
			}
			$_polyline['coords'][] = array("lat"=>$lat2, "long"=>$lon2);
		}
		if($id === false){
			$this->_polylines[] = $_polyline;
			$id = count($this->_polylines) - 1;
		}else{
			$this->_polylines[$id] = $_polyline;
		}
		$this->adjustCenterCoords($lon1,$lat1);
		$this->adjustCenterCoords($lon2,$lat2);
		// return index of polyline
		return $id;
	}
	
	/**
	 * function to add an elevation profile for a polyline to the page
	 */
	 function addPolylineElevation($polyline_id, $elevation_dom_id, $samples=256, $width="", $height="", $focus_color="#00ff00"){
		if(isset($this->_polylines[$polyline_id])){
			$this->_elevation_polylines[$polyline_id] = array(
				"dom_id"=>$elevation_dom_id,
				"samples"=>$samples,
				"width"=>($width!=""?$width:str_replace("px","",$this->width)),
				"height"=>($height!=""?$height:str_replace("px","",$this->height)/2),
				"focus_color"=>$focus_color
			);
		}
	 }
	
	/**
	 * function to add an overlay to the map.
	 */
	 function addOverlay($bds_lat1, $bds_lon1, $bds_lat2, $bds_lon2, $img_src, $opacity = 100){
		 $_overlay = array(
			"bounds" => array(
				"ne"=>array(
					"lat"=>$bds_lat1,
					"long"=>$bds_lon1
				),
				"sw"=>array(
					"lat"=>$bds_lat2,
					"long"=>$bds_lon2
				)
			),
			"img" => $img_src,
			"opacity" => $opacity/10
		 );
		 $this->adjustCenterCoords($bds_lon1,$bds_lat1);
		 $this->adjustCenterCoords($bds_lon2,$bds_lat2);
		 $this->_overlays[] = $_overlay;
		 return count($this->_overlays)-1;
	 }
	 
	 /**
	  * function to add a KML overlay to the map.
	  *  *Note that this expects a filename and file parsing/processing is done
	  *  on the client side
	  */
	 function addKMLOverlay($file){
		$this->_kml_overlays[] = $file;
		return count($this->_kml_overlays)-1;
	 }
		
	/**
	 * adjust map center coordinates by the given lat/lon point
	 * 
	 * @param string $lon the map latitude (horizontal)
	 * @param string $lat the map latitude (vertical)
	 */
	function adjustCenterCoords($lon,$lat) {
		if(strlen((string)$lon) == 0 || strlen((string)$lat) == 0)
			return false;
		$this->_max_lon = (float) max($lon, $this->_max_lon);
		$this->_min_lon = (float) min($lon, $this->_min_lon);
		$this->_max_lat = (float) max($lat, $this->_max_lat);
		$this->_min_lat = (float) min($lat, $this->_min_lat);
		$this->center_lon = (float) ($this->_min_lon + $this->_max_lon) / 2;
		$this->center_lat = (float) ($this->_min_lat + $this->_max_lat) / 2;
		return true;
	}

	/**
	 * set map center coordinates to lat/lon point
	 * 
	 * @param string $lon the map latitude (horizontal)
	 * @param string $lat the map latitude (vertical)
	 */
	function setCenterCoords($lon,$lat) {
		$this->center_lat = (float) $lat;
		$this->center_lon = (float) $lon;
	}	

	/**
	 * generate an array of params for a new marker icon image
	 * iconShadowImage is optional
	 * If anchor coords are not supplied, we use the center point of the image by default. 
	 * Can be called statically. For private use by addMarkerIcon() and setMarkerIcon() and addIcon()
	 *
	 * @param string $iconImage URL to icon image
	 * @param string $iconShadowImage URL to shadow image
	 * @param string $iconAnchorX X coordinate for icon anchor point
	 * @param string $iconAnchorY Y coordinate for icon anchor point
	 * @param string $infoWindowAnchorX X coordinate for info window anchor point
	 * @param string $infoWindowAnchorY Y coordinate for info window anchor point
	 * @return array Array with information about newly /previously created icon.
	 */
	function createMarkerIcon($iconImage,$iconShadowImage = '',$iconAnchorX = 'x',$iconAnchorY = 'x',$infoWindowAnchorX = 'x',$infoWindowAnchorY = 'x') {
		$_icon_image_path = strpos($iconImage,'http') === 0 ? $iconImage : $_SERVER['DOCUMENT_ROOT'] . $iconImage;
		if(!($_image_info = @getimagesize($_icon_image_path))) {
			die('GoogleMapAPI:createMarkerIcon: Error reading image: ' . $iconImage);	
		}
		if($iconShadowImage) {
			$_shadow_image_path = strpos($iconShadowImage,'http') === 0 ? $iconShadowImage : $_SERVER['DOCUMENT_ROOT'] . $iconShadowImage;
			if(!($_shadow_info = @getimagesize($_shadow_image_path))) {
				die('GoogleMapAPI:createMarkerIcon: Error reading shadow image: ' . $iconShadowImage);
			}
		}
		
		if($iconAnchorX === 'x') {
			$iconAnchorX = (int) ($_image_info[0] / 2);
		}
		if($iconAnchorY === 'x') {
			$iconAnchorY = (int) ($_image_info[1] / 2);
		}
		if($infoWindowAnchorX === 'x') {
			$infoWindowAnchorX = (int) ($_image_info[0] / 2);
		}
		if($infoWindowAnchorY === 'x') {
			$infoWindowAnchorY = (int) ($_image_info[1] / 2);
		}
						
		$icon_info = array(
				'image' => $iconImage,
				'iconWidth' => $_image_info[0],
				'iconHeight' => $_image_info[1],
				'iconAnchorX' => $iconAnchorX,
				'iconAnchorY' => $iconAnchorY,
				'infoWindowAnchorX' => $infoWindowAnchorX,
				'infoWindowAnchorY' => $infoWindowAnchorY
				);
		if($iconShadowImage) {
			$icon_info = array_merge($icon_info, array('shadow' => $iconShadowImage,
														'shadowWidth' => $_shadow_info[0],
														'shadowHeight' => $_shadow_info[1]));
		}
		return $icon_info;
	}
	
	/**
	 * set the default marker icon for ALL markers on the map
	 * NOTE: This MUST be set prior to adding markers in order for the defaults
	 * to be set correctly.
	 * @param string $iconImage URL to icon image
	 * @param string $iconShadowImage URL to shadow image
	 * @param string $iconAnchorX X coordinate for icon anchor point
	 * @param string $iconAnchorY Y coordinate for icon anchor point
	 * @param string $infoWindowAnchorX X coordinate for info window anchor point
	 * @param string $infoWindowAnchorY Y coordinate for info window anchor point
	 * @return string A marker icon key.
	 */
	function setMarkerIcon($iconImage,$iconShadowImage = '',$iconAnchorX = 'x',$iconAnchorY = 'x',$infoWindowAnchorX = 'x',$infoWindowAnchorY = 'x') {
		$this->default_icon = $iconImage;
		$this->default_icon_shadow = $iconShadowImage;
		return $this->setMarkerIconKey($iconImage,$iconShadowImage,$iconAnchorX,$iconAnchorY,$infoWindowAnchorX,$infoWindowAnchorY);		
	}
	
	/**
	 * function to check if icon is in  class "marker_iconset", if it is, 
	 * returns the key, if not, creates a new array indice and returns the key
	 * @param string $iconImage URL to icon image
	 * @param string $iconShadowImage URL to shadow image
	 * @param string $iconAnchorX X coordinate for icon anchor point
	 * @param string $iconAnchorY Y coordinate for icon anchor point
	 * @param string $infoWindowAnchorX X coordinate for info window anchor point
	 * @param string $infoWindowAnchorY Y coordinate for info window anchor point
	 * @return string A marker icon key.
	 */
	function setMarkerIconKey($iconImage,$iconShadow='',$iconAnchorX = 'x',$iconAnchorY = 'x',$infoWindowAnchorX = 'x',$infoWindowAnchorY = 'x'){
		$_iconKey = $this->getIconKey($iconImage,$iconShadow);
		if(isset($this->_marker_icons[$_iconKey])){
			return $_iconKey;
		}else{
			return $this->addIcon($iconImage,$iconShadow,$iconAnchorX,$iconAnchorY,$infoWindowAnchorX,$infoWindowAnchorY);
		}
	}
	
	/**
	 * function to get icon key
	 * @param string $iconImage URL to marker icon image
	 * @param string $iconShadow URL to marker icon shadow image
	 * @return string Returns formatted icon key from icon or icon+shadow image name pairs
	 */
	function getIconKey($iconImage,$iconShadow=""){
		return str_replace(array("/",":","."),"",$iconImage.$iconShadow);
	}
 
	/**
	 * add an icon to "iconset"
	 * @param string $iconImage URL to marker icon image
	 * @param string $iconShadow URL to marker icon shadow image
	 * @param string $iconAnchorX X coordinate for icon anchor point
	 * @param string $iconAnchorY Y coordinate for icon anchor point
	 * @param string $infoWindowAnchorX X coordinate for info window anchor point
	 * @param string $infoWindowAnchorY Y coordinate for info window anchor point
	 * @return string Returns the icon's key.  
	 */
	function addIcon($iconImage,$iconShadowImage = '',$iconAnchorX = 'x',$iconAnchorY = 'x',$infoWindowAnchorX = 'x',$infoWindowAnchorY = 'x') {
		$_iconKey = $this->getIconKey($iconImage, $iconShadowImage);
		$this->_marker_icons[$_iconKey] = $this->createMarkerIcon($iconImage,$iconShadowImage,$iconAnchorX,$iconAnchorY,$infoWindowAnchorX,$infoWindowAnchorY);
		return $_iconKey;
	}
	
	/**
	 * updates a marker's icon key.
	 * NOTE: To be used in lieu of addMarkerIcon, now use addIcon + updateMarkerIconKey for explicit icon association
	 * @param string $markerKey Marker key to define which marker's icon to update
	 * @param string $iconKey Icon key to define which icon to use.
	 */
	function updateMarkerIconKey($markerKey, $iconKey){
		if(isset($this->_markers[$markerKey])){
			$this->_markers[$markerKey]['icon_key'] = $iconKey;
		}
	}	

	/**
	 * print map header javascript (goes between <head></head>)
	 * 
	 */
	function printHeaderJS() {
		return $this->getHeaderJS();
	}
	
	/**
	 * return map header javascript (goes between <head></head>)
	 * 
	 */
	function getHeaderJS() {
		$_headerJS = "";
		if( $this->mobile == true){
			$_headerJS .= "
				<meta name='viewport' content='initial-scale=1.0, user-scalable=no' />
			";
		}
		if(!empty($this->_elevation_polylines)||(!empty($this->_directions)&&$this->elevation_directions)){
			$_headerJS .= "<script type='text/javascript' src='http://www.google.com/jsapi'></script>";
			$_headerJS .= "
			<script type='text/javascript'>
				// Load the Visualization API and the piechart package.
				google.load('visualization', '1', {packages: ['columnchart']});
			</script>";
		}
		$_headerJS .= "<script type='text/javascript' src='http://maps.google.com/maps/api/js?sensor=".(($this->mobile==true)?"true":"false")."'></script>";
		if($this->marker_clusterer){
			$_headerJS .= "<script type='text/javascript' src='".$this->marker_clusterer_location."' ></script>";
		}		
		if($this->local_search){/*TODO: Load Local Search API V3 when available*/}	
		return $_headerJS;
	}	
	
	/**
	* prints onLoad() without having to manipulate body tag.
	* call this after the print map like so...	
	*	  $map->printMap();	
	*	  $map->printOnLoad();	
	*/
	function printOnLoad() {
		return $this->getOnLoad();
	}
	
	/**
	 * print onLoad function name
	 */
	function printOnLoadFunction(){
		return $this->getOnLoadFunction();
	}

	/**
	 * return js to set onload function
	 */
	function getOnLoad() {
		return '<script language="javascript" type="text/javascript" charset="utf-8">window.onload=onLoad'.$this->map_id.';</script>';						
	}
	
	/**
	 * return js to set onload function
	 */
	function getOnLoadFunction() {
		return 'onLoad'.$this->map_id;						
	}	

	/**
	 * print map javascript (put just before </body>, or in <header> if using onLoad())
	 * 
	 */
	function printMapJS() {
		return $this->getMapJS();
	}	

	/**
	 * return map javascript
	 * 
	 */
	function getMapJS() {
		$_script = "";
		$_key = $this->map_id;
		$_output = '<script type="text/javascript" charset="utf-8">' . "\n";
		$_output .= '//<![CDATA[' . "\n";
		$_output .= "/*************************************************\n";
		$_output .= " * Created with GoogleMapAPI" . $this->_version . "\n";
		$_output .= " * Author: Brad Wedell <brad AT mycnl DOT com>\n";
		$_output .= " * Link http://code.google.com/p/phpgooglemapapiv3/\n";
		$_output .= " * Copyright 2010 Brad Wedell\n";
		$_output .= " * Original Author: Monte Ohrt <monte AT ohrt DOT com>\n";
		$_output .= " * Original Copyright 2005-2006 New Digital Group\n";
		$_output .= " * Originial Link http://www.phpinsider.com/php/code/GoogleMapAPI/\n";
		$_output .= " *************************************************/\n";
		if($this->street_view_dom_id!=""){
			$_script .= "
				var panorama".$this->street_view_dom_id."$_key = '';
			";
			if(!empty($this->_markers)){
				$_script .= "
					var panorama".$this->street_view_dom_id."markers$_key = [];
				";
			}
		}
		
		if(!empty($this->_markers)){
			$_script .= "
				var markers$_key  = [];
			";
			if($this->sidebar) {		
				$_script .= "
					var sidebar_html$_key  = '';
					var marker_html$_key  = [];
				";
			}
		}
		if($this->marker_clusterer){
			$_script .= "
			  var markerClusterer$_key = null;
			";
		}		
		if($this->directions) {		
			$_script .= "
				var to_htmls$_key  = [];
				var from_htmls$_key  = [];
			";
		}
		if(!empty($this->_directions)){
			$_script .= "
				var directions$_key = [];
			";
		}
		//Polylines
		if(!empty($this->_polylines)){
			$_script .= "
				var polylines$_key = [];
				var polylineCoords$_key = [];
			";
			if(!empty($this->_elevation_polylines)){
				$_script .= "
					var elevationPolylines$_key = [];
				";
			}
		}
		//Elevation stuff
		if(!empty($this->_elevation_polylines)||(!empty($this->_directions)&&$this->elevation_directions)){
			$_script .= "
				var elevationCharts$_key = [];				
			";
		}
		//Overlays
		if(!empty($this->_overlays)){
			$_script .= "
				var overlays$_key = [];
			";
		}
		//KML Overlays
		if(!empty($this->_kml_overlays)){
			$_script .= "
				var kml_overlays$_key = [];
			";
		}
		//New Icons
		if(!empty($this->_marker_icons)){
			$_script .= "var icon$_key  = []; \n";
			foreach($this->_marker_icons as $icon_key=>$icon_info){
				//no need to check icon key here since that's already done with setters
				$_script .= "
				  icon".$_key."['$icon_key'] = {};
				  icon".$_key."['$icon_key'].image =  new google.maps.MarkerImage('".$icon_info["image"]."',
					  // The size
					  new google.maps.Size(".$icon_info['iconWidth'].", ".$icon_info['iconHeight']."),
					  // The origin(sprite)
					  new google.maps.Point(0,0),
					  // The anchor
					  new google.maps.Point(".$icon_info['iconAnchorX'].", ".$icon_info['iconAnchorY'].")
				  );
				";
				if(isset($icon_info['shadow']) && $icon_info['shadow']!=""){
				  $_script .= "
					icon".$_key."['$icon_key'].shadow = new google.maps.MarkerImage('".$icon_info["shadow"]."',
					  // The size
					  new google.maps.Size(".$icon_info['shadowWidth'].", ".$icon_info['shadowHeight']."),
					  // The origin(sprite)
					  new google.maps.Point(0,0),
					  // The anchor
					  new google.maps.Point(".$icon_info['iconAnchorX'].", ".$icon_info['iconAnchorY'].")
					);
				  ";
				}
			}
		}
							
		$_script .= "var map$_key = null;\n";
		
		//start setting script var
		if($this->onload) {
			$_script .= 'function onLoad'.$this->map_id.'() {' . "\n";	
		} 
				
		if(!empty($this->browser_alert)) {
			//TODO:Update with new browser catch - GBrowserIsCompatible is deprecated
			//$_output .= 'if (GBrowserIsCompatible()) {' . "\n";
		}
		
		/*
		 *TODO:Update with local search bar once implemented in V3 api 
		$strMapOptions = "";
		if($this->local_search){
			$_output .= "
				mapOptions.googleBarOptions= {
					style : 'new'
					".(($this->local_search_ads)?",
					adsOptions: {
						client: '".$this->ads_pub_id."',
						channel: '".$this->ads_channel."',
						language: 'en'
					":"")."
				};
			";			
			$strMapOptions .= ", mapOptions";
		}
		*/
		
		if($this->display_map){
			$_script .= sprintf('var mapObj%s = document.getElementById("%s");', $_key, $this->map_id) . "\n";
			$_script .= "if (mapObj$_key != 'undefined' && mapObj$_key != null) {\n";
			
			$_script .= "
				var mapOptions$_key = {
					zoom: ".$this->zoom.",
					mapTypeId: google.maps.MapTypeId.".$this->map_type.",
					mapTypeControl: ".($this->type_controls?"true":"false").",
					mapTypeControlOptions: {style: google.maps.MapTypeControlStyle.".$this->type_controls_style."}
				};
			";
			if(isset($this->center_lat) && isset($this->center_lon)) {
				// Special care for decimal point in lon and lat, would get lost if "wrong" locale is set; applies to (s)printf only
				$_script .= "
					mapOptions".$_key.".center = new google.maps.LatLng(
						".number_format($this->center_lat, 6, ".", "").",
						".number_format($this->center_lon, 6, ".", "")."
					);
				";
			}	
			
			if($this->street_view_controls){
				$_script .= "
					mapOptions".$_key.".streetViewControl= true;
	
				";
			}
			
			$_script .= "
				map$_key = new google.maps.Map(mapObj$_key,mapOptions$_key);
			";
				
			if($this->street_view_dom_id!=""){
				$_script .= "
					panorama".$this->street_view_dom_id."$_key = new  google.maps.StreetViewPanorama(document.getElementById('".$this->street_view_dom_id."'));
					map$_key.setStreetView(panorama".$this->street_view_dom_id."$_key);
				";
				
				if(!empty($this->_markers)){
					
					//Add markers to the street view
					if($this->street_view_dom_id!=""){
						$_script .= $this->getAddMarkersJS($this->map_id, $pano=true);
					}
					//set center to last marker
					$last_id = count($this->_markers)-1;
					
					$_script .= "
						panorama".$this->street_view_dom_id."$_key.setPosition(new google.maps.LatLng(
							".$this->_markers[$last_id]["lat"].",
							".$this->_markers[$last_id]["lon"]."
						));
						panorama".$this->street_view_dom_id."$_key.setVisible(true);
					";
				}
			}
			
			if(!empty($this->_directions)){
				$_script .= $this->getAddDirectionsJS();
			}
			
			//TODO:add support for Google Earth Overlay once integrated with V3
			//$_output .= "map.addMapType(G_SATELLITE_3D_MAP);\n";
			
			// zoom so that all markers are in the viewport
			if($this->zoom_encompass && (count($this->_markers) > 1 || count($this->_polylines) >= 1 || count($this->_overlays) >= 1)) {
				// increase bounds by fudge factor to keep
				// markers away from the edges
				$_len_lon = $this->_max_lon - $this->_min_lon;
				$_len_lat = $this->_max_lat - $this->_min_lat;
				$this->_min_lon -= $_len_lon * $this->bounds_fudge;
				$this->_max_lon += $_len_lon * $this->bounds_fudge;
				$this->_min_lat -= $_len_lat * $this->bounds_fudge;
				$this->_max_lat += $_len_lat * $this->bounds_fudge;
	
				$_script .= "var bds$_key = new google.maps.LatLngBounds(new google.maps.LatLng($this->_min_lat, $this->_min_lon), new google.maps.LatLng($this->_max_lat, $this->_max_lon));\n";
				$_script .= 'map'.$_key.'.fitBounds(bds'.$_key.');' . "\n";
			}
			
			/*
			 * TODO: Update controls to use new API v3 methods.(Not a priority, see below)
			 * default V3 functionality caters control display according to the 
			 * device that's accessing the page, as well as the specified width
			 * and height of the map itself.
			if($this->map_controls) {
			  if($this->control_size == 'large')
				  $_output .= 'map.addControl(new GLargeMapControl(), new GControlPosition(G_ANCHOR_TOP_LEFT, new GSize(10,10)));' . "\n";
			  else
				  $_output .= 'map.addControl(new GSmallMapControl(), new GControlPosition(G_ANCHOR_TOP_RIGHT, new GSize(10,60)));' . "\n";
			}
			if($this->type_controls) {
				$_output .= 'map.addControl(new GMapTypeControl(), new GControlPosition(G_ANCHOR_TOP_RIGHT, new GSize(10,10)));' . "\n";
			}
			
			if($this->scale_control) {
				if($this->control_size == 'large'){
					$_output .= 'map.addControl(new GScaleControl(), new GControlPosition(G_ANCHOR_TOP_RIGHT, new GSize(35,190)));' . "\n";
				}else {
					$_output .= 'map.addControl(new GScaleControl(), new GControlPosition(G_ANCHOR_BOTTOM_RIGHT, new GSize(190,10)));' . "\n";
				}
			}
			if($this->overview_control) {
				$_output .= 'map.addControl(new GOverviewMapControl());' . "\n";
			}
			
			 * TODO: Update with ads_manager stuff once integrated into V3
			if($this->ads_manager){
				$_output .= 'var adsManager = new GAdsManager(map, "'.$this->ads_pub_id.'",{channel:"'.$this->ads_channel.'",maxAdsOnMap:"'.$this->ads_max.'"});
			adsManager.enable();'."\n";
			
			}
			 * TODO: Update with local search once integrated into V3
			if($this->local_search){
				$_output .= "\n
					map.enableGoogleBar();
				";
			}
			*/
			
			if($this->traffic_overlay){
				$_script .= "
					var trafficLayer = new google.maps.TrafficLayer();
					trafficLayer.setMap(map$_key);
				";			
			}
			
			if($this->biking_overlay){
				$_script .= "
					var bikingLayer = new google.maps.BicyclingLayer();
					bikingLayer.setMap(map$_key);
				";			
			}
			
			$_script .= $this->getAddMarkersJS();
			
			$_script .= $this->getPolylineJS();
			$_script .= $this->getAddOverlayJS();
			
			if($this->_kml_overlays!==""){
			  foreach($this->_kml_overlays as $_kml_key=>$_kml_file){
				  $_script .= "
					  kml_overlays$_key[$_kml_key]= new google.maps.KmlLayer('$_kml_file');
					  kml_overlays$_key[$_kml_key].setMap(map$_key);
				  ";
			  }
			  $_script .= "
				  
			  ";
			}

			 //end JS if mapObj != "undefined" block
			$_script .= '}' . "\n";
		
		}//end if $this->display_map==true
		
		if(!empty($this->browser_alert)) {
			//TODO:Update with new browser catch SEE ABOVE
			// $_output .= '} else {' . "\n";
			// $_output .= 'alert("' . str_replace('"','\"',$this->browser_alert) . '");' . "\n";
			// $_output .= '}' . "\n";
		}						

		if($this->onload) {
			$_script .= '}' . "\n";
		}
		
		$_script .= $this->getMapFunctions();
		
		if($this->_minify_js){
			$this->CI = &get_instance();
			$this->CI->load->library('JSMin');
			$_script = $this->CI->jsmin->minify($_script);
		}
		
		//Append script to output
		$_output .= $_script;
		$_output .= '//]]>' . "\n";
		$_output .= '</script>' . "\n";
		return $_output;
	}
	
	/**
	 * function to render utility functions for use on the page
	 */
	 function getMapFunctions(){
		$_script = "";
		if($this->_display_js_functions===true){
			$_script = $this->getUtilityFunctions();			
		}
		return $_script;
	 }
	 
	 function getUtilityFunctions(){
		 $_script = "";
		 if(!empty($this->_markers))
		 	$_script .= $this->getCreateMarkerJS();
		 if(!empty($this->_overlays))
		 	$_script .= $this->getCreateOverlayJS();
		 if(!empty($this->_elevation_polylines)||(!empty($this->_directions)&&$this->elevation_directions))
		 	$_script .= $this->getPlotElevationJS();
		 // Utility functions used to distinguish between tabbed and non-tabbed info windows
		 $_script .= 'function isArray(a) {return isObject(a) && a.constructor == Array;}' . "\n";
		 $_script .= 'function isObject(a) {return (a && typeof a == \'object\') || isFunction(a);}' . "\n";
		 $_script .= 'function isFunction(a) {return typeof a == \'function\';}' . "\n";
		 $_script .= 'function isEmpty(obj) { for(var i in obj) { return false; } return true; }'."\n";	 
		 return $_script;
	 }

	/**
	 * overridable function for generating js to add markers
	 */
	function getAddMarkersJS($map_id = "", $pano= false) {
		//defaults
		if($map_id == ""){
			$map_id = $this->map_id;
		}
		
		if($pano==false){
			$_prefix = "map";
		}else{
			$_prefix = "panorama".$this->street_view_dom_id;
		}
		$_output = '';
		foreach($this->_markers as $_marker) {
			$iw_html = str_replace('"','\"',str_replace(array("\n", "\r"), "", $_marker['html']));
			$_output .= "var point = new google.maps.LatLng(".$_marker['lat'].",".$_marker['lon'].");\n";
			$_output .= sprintf('%s.push(createMarker(%s%s, point,"%s","%s", %s, %s, "%s", %s ));',
				(($pano==true)?$_prefix:"")."markers".$map_id,
				$_prefix,				
				$map_id,
				str_replace('"','\"',$_marker['title']),
				str_replace('/','\/',$iw_html),
				(isset($_marker["icon_key"]))?"icon".$map_id."['".$_marker["icon_key"]."'].image":"''",
				(isset($_marker["icon_key"])&&isset($_marker["shadow_icon"]))?"icon".$map_id."['".$_marker["icon_key"]."'].shadow":"''",
				(($this->sidebar)?$this->sidebar_id:""),
				((isset($_marker["openers"])&&count($_marker["openers"])>0)?json_encode($_marker["openers"]):"''")
			) . "\n";
		}
		
		if($this->marker_clusterer && $pano==false){//only do marker clusterer for map, not streetview
			$_output .= "
				markerClusterer".$map_id." = new MarkerClusterer(".$_prefix.$map_id.", markers".$map_id.", {
				  maxZoom: ".$this->marker_clusterer_options["maxZoom"].",
				  gridSize: ".$this->marker_clusterer_options["gridSize"].",
				  styles: ".$this->marker_clusterer_options["styles"]."
				});
					
			";
		}
		return $_output;
	}

	/**
	 * overridable function to generate polyline js - for now can only be used on a map, not a streetview
	 */
	function getPolylineJS() {
		$_output = '';
		foreach($this->_polylines as $polyline_id =>$_polyline) {
			$_coords_output = "";
			foreach($_polyline["coords"] as $_coords){
				if($_coords_output != ""){$_coords_output.=",";}
				$_coords_output .= "
					new google.maps.LatLng(".$_coords["lat"].", ".$_coords["long"].")
				";
			}
			$_output .= "
				polylineCoords".$this->map_id."[$polyline_id] = [".$_coords_output."];		
				polylines".$this->map_id."[$polyline_id] = new google.maps.Polyline({
				  path: polylineCoords".$this->map_id."[$polyline_id]
				  ".(($_polyline['color']!="")?", strokeColor: '".$_polyline['color']."'":"")."
				  ".(($_polyline['opacity']!=0)?", strokeOpacity: ".$_polyline['opacity']."":"")."
				  ".(($_polyline['weight']!=0)?", strokeWeight: ".$_polyline['weight']."":"")."
			  });			
			  polylines".$this->map_id."[$polyline_id].setMap(map".$this->map_id.");
			";
			
			//Elevation profiles
			if(!empty($this->_elevation_polylines) && isset($this->_elevation_polylines[$polyline_id])){
				$elevation_dom_id=$this->_elevation_polylines[$polyline_id]["dom_id"];
				$width = $this->_elevation_polylines[$polyline_id]["width"];
				$height = $this->_elevation_polylines[$polyline_id]["height"];
				$samples = $this->_elevation_polylines[$polyline_id]["samples"];
				$focus_color = $this->_elevation_polylines[$polyline_id]["focus_color"];
				$_output .= "
					elevationPolylines".$this->map_id."[$polyline_id] = {
						'selector':'$elevation_dom_id',
						'chart': new google.visualization.ColumnChart(document.getElementById('$elevation_dom_id')),
						'service': new google.maps.ElevationService(),
						'width':$width,
						'height':$height,
						'focusColor':'$focus_color',
						'marker':null
					};
					elevationPolylines".$this->map_id."[$polyline_id]['service'].getElevationAlongPath({
						path: polylineCoords".$this->map_id."[$polyline_id],
						samples: $samples
					}, function(results,status){plotElevation(results,status, elevationPolylines".$this->map_id."[$polyline_id], map".$this->map_id.", elevationCharts".$this->map_id.");});
				";
			}
		}
		return $_output;
	}
	
	/**
	 * function to render proper calls for directions - for now can only be used on a map, not a streetview
	 */
	 function getAddDirectionsJS(){
		$_output = ""; 
		 
		foreach($this->_directions as $directions){
			$dom_id = $directions["dom_id"];			
			$travelModeParams = array();
			$directionsParams = "";		 
			if($this->walking_directions==TRUE)
				$directionsParams .= ", \n travelMode:google.maps.DirectionsTravelMode.WALKING";
			else if($this->biking_directions==TRUE)
				$directionsParams .= ", \n travelMode:google.maps.DirectionsTravelMode.BICYCLING";
			else
				$directionsParams .= ", \n travelMode:google.maps.DirectionsTravelMode.DRIVING";
			
			if($this->avoid_highways==TRUE)
				$directionsParams .= ", \n avoidHighways: true";
			if($this->avoid_tollways==TRUE)
				$directionsParams .= ", \n avoidTolls: true";			
			
			$_output .= "
				directions".$this->map_id."['$dom_id'] = {
					displayRenderer:new google.maps.DirectionsRenderer(),
					directionService:new google.maps.DirectionsService(),
					request:{
						origin: '".$directions["start"]."',
						destination: '".$directions["dest"]."'
						$directionsParams
					}
					".(($this->elevation_directions)?",		
						selector: '".$directions["elevation_dom_id"]."',
						chart: new google.visualization.ColumnChart(document.getElementById('".$directions["elevation_dom_id"]."')),
						service: new google.maps.ElevationService(),
						width:".$directions["width"].",
						height:".$directions["height"].",
						focusColor:'#00FF00',
						marker:null
					":"")."
				};
				directions".$this->map_id."['$dom_id'].displayRenderer.setMap(map".$this->map_id.");
				directions".$this->map_id."['$dom_id'].displayRenderer.setPanel(document.getElementById('$dom_id'));
				directions".$this->map_id."['$dom_id'].directionService.route(directions".$this->map_id."['$dom_id'].request, function(response, status) {
					if (status == google.maps.DirectionsStatus.OK) {
						directions".$this->map_id."['$dom_id'].displayRenderer.setDirections(response);
						".(($this->elevation_directions)?"
							directions".$this->map_id."['$dom_id'].service.getElevationAlongPath({
								path: response.routes[0].overview_path,
								samples: ".$directions["elevation_samples"]."
							}, function(results,status){plotElevation(results,status, directions".$this->map_id."['$dom_id'], map".$this->map_id.", elevationCharts".$this->map_id.");});
						":"")."
					}
				});
			 ";
		 }
		 
		 return $_output;
	 }
	
	/**
	 * function to get overlay creation JS.
	 */
	 function getAddOverlayJS(){
		 $_output = "";
		 foreach($this->_overlays as $_key=>$_overlay){
			 $_output .= "
			 	 var bounds = new google.maps.LatLngBounds(new google.maps.LatLng(".$_overlay["bounds"]["ne"]["lat"].", ".$_overlay["bounds"]["ne"]["long"]."), new google.maps.LatLng(".$_overlay["bounds"]["sw"]["lat"].", ".$_overlay["bounds"]["sw"]["long"]."));
				 var image = '".$_overlay["img"]."';
				 overlays".$this->map_id."[$_key] = new CustomOverlay(bounds, image, map".$this->map_id.", ".$_overlay["opacity"].");
			 ";
		 }
		 return $_output;
	 }

	/**
	 * overridable function to generate the js for the js function for creating a marker.
	 */
	function getCreateMarkerJS() {
		$_output = "
			function createMarker(map, point, title, html, icon, icon_shadow, sidebar_id, openers){
				var marker_options = {
					position: point,
					map: map,
					title: title};  
				if(icon!=''){marker_options.icon = icon;}
				if(icon_shadow!=''){marker_options.icon_shadow = icon_shadow;}
				//create marker
				var new_marker = new google.maps.Marker(marker_options);
				if(html!=''){
					".(($this->info_window)?"
					var infowindow = new google.maps.InfoWindow({content: html});
					google.maps.event.addListener(new_marker, '".$this->window_trigger."', function() {
					  infowindow.open(map,new_marker);
					});
					if(openers != ''&&!isEmpty(openers)){
						for(var i in openers){
						 var opener = document.getElementById(openers[i]);
						 opener.on".$this->window_trigger." = function(){infowindow.open(map,new_marker); return false};
						}
					}
					":"")."
					if(sidebar_id != ''){
						var sidebar = document.getElementById(sidebar_id);
						if(sidebar!=null && sidebar!=undefined && title!=null && title!=''){
							var newlink = document.createElement('a');
							".(($this->info_window)?"
							newlink.onclick=function(){infowindow.open(map,new_marker); return false};
							":"
							newlink.onclick=function(){map.setCenter(point); return false};
							")."
							newlink.innerHTML = title;
							sidebar.appendChild(newlink);
						}
					}
				}
				return new_marker;  
			}
		";
		return $_output;
	}
	
	/**
	 * Get create overlay js
	 */
	 function getCreateOverlayJS(){
		 $_output = "
		 	CustomOverlay.prototype = new google.maps.OverlayView();	
			function CustomOverlay(bounds, image, map, opacity){
				this.bounds_ = bounds;
				this.image_ = image;
				this.map_ = map;
				this.div_ = null;
				this.opacity = (opacity!='')?opacity:10;
				this.setMap(map);
			}
			CustomOverlay.prototype.onAdd = function() {
				var div = document.createElement('DIV');
				div.style.borderStyle = 'none';
				div.style.borderWidth = '0px';
				div.style.position = 'absolute';
				var img = document.createElement('img');
				img.src = this.image_;
				img.style.width = '100%';
				img.style.height = '100%';
				img.style.opacity = this.opacity/10;
				img.style.filter = 'alpha(opacity='+this.opacity*10+')';	
				div.appendChild(img);
				this.div_ = div;	
				var panes = this.getPanes();
				panes.overlayImage.appendChild(div);
			}
			CustomOverlay.prototype.draw = function() {
				var overlayProjection = this.getProjection();
				var sw = overlayProjection.fromLatLngToDivPixel(this.bounds_.getSouthWest());
				var ne = overlayProjection.fromLatLngToDivPixel(this.bounds_.getNorthEast());
				var div = this.div_;
				div.style.left = sw.x + 'px';
				div.style.top = ne.y + 'px';
				div.style.width = (ne.x - sw.x) + 'px';
				div.style.height = (sw.y - ne.y) + 'px';
			}
			CustomOverlay.prototype.onRemove = function() {
				this.div_.parentNode.removeChild(this.div_);
				this.div_ = null;
			}
		 ";		 
		 return $_output;
	 }
	 
	 /**
	  * print helper function to draw elevation results as a chart
	  */
	function getPlotElevationJS(){
		$_output = "
			function plotElevation(results, status, elevation_data, map, charts_array) {
				charts_array[elevation_data.selector] = {
					results:results,
					data:new google.visualization.DataTable()
				};
				charts_array[elevation_data.selector].data.addColumn('string', 'Sample');
				charts_array[elevation_data.selector].data.addColumn('number', 'Elevation');
				for (var i = 0; i < charts_array[elevation_data.selector].results.length; i++) {
				  charts_array[elevation_data.selector].data.addRow(['', charts_array[elevation_data.selector].results[i].elevation]);
				}
				document.getElementById(elevation_data.selector).style.display = 'block';
				elevation_data.chart.draw(charts_array[elevation_data.selector].data, {
				  width: elevation_data.width,
				  height: elevation_data.height,
				  legend: 'none',
				  titleY: 'Elevation (m)',
				  focusBorderColor: elevation_data.focusColor
				});
		";
		if($this->elevation_markers){
			$_output .= $this->getElevationMarkerJS();			
		}
		$_output .= "}";
		return $_output;
	}	  
	
	/**
	 * create JS that is inside of JS plot elevation function
	 */
	 function getElevationMarkerJS(){
		 $_output = "
			google.visualization.events.addListener(elevation_data.chart, 'onmouseover', function(e) {
				if(elevation_data.marker==null){
					elevation_data.marker = new google.maps.Marker({
					  position: charts_array[elevation_data.selector].results[e.row].location,
					  map: map,
					  icon: 'http://maps.google.com/mapfiles/ms/icons/green-dot.png'
					});
				}else{
					elevation_data.marker.setPosition(charts_array[elevation_data.selector].results[e.row].location);
				}
				map.setCenter(charts_array[elevation_data.selector].results[e.row].location);
			});
			document.getElementById(elevation_data.selector).onmouseout = function(){
				elevation_data.marker = clearElevationMarker(elevation_data.marker);
			};
			function clearElevationMarker(marker){
			  if(marker!=null){
				  marker.setMap(null);
				  return null;
			  }
			}
		";
		return $_output;
	 }
	 

	/**
	 * print map (put at location map will appear)
	 * 
	 */
	function printMap() {
		return $this->getMap();
	}

	/**
	 * return map
	 * 
	 */
	function getMap() {
		$_output = '<script type="text/javascript" charset="utf-8">' . "\n" . '//<![CDATA[' . "\n";
		//$_output .= 'if (GBrowserIsCompatible()) {' . "\n";
		if(strlen($this->width) > 0 && strlen($this->height) > 0) {
			$_output .= sprintf('document.write(\'<div id="%s" style="width: %s; height: %s; position:relative;"><\/div>\');',$this->map_id,$this->width,$this->height) . "\n";
		} else {
			$_output .= sprintf('document.write(\'<div id="%s" style="position:relative;"><\/div>\');',$this->map_id) . "\n";	 
		}
		//$_output .= '}';

		//if(!empty($this->js_alert)) {
		//	$_output .= ' else {' . "\n";
		//	$_output .= sprintf('document.write(\'%s\');', str_replace('/','\/',$this->js_alert)) . "\n";
		//	$_output .= '}' . "\n";
		//}

		$_output .= '//]]>' . "\n" . '</script>' . "\n";

		if(!empty($this->js_alert)) {
			$_output .= '<noscript>' . $this->js_alert . '</noscript>' . "\n";
		}

		return $_output;
	}

	
	/**
	 * print sidebar (put at location sidebar will appear)
	 * 
	 */
	function printSidebar() {
		return $this->getSidebar();
	}	

	/**
	 * return sidebar html
	 * 
	 */
	function getSidebar() {
		return sprintf('<div id="%s" class="'.$this->sidebar_id.'"></div>',$this->sidebar_id) . "\n";
	}	
			
	/**
	 * get the geocode lat/lon points from given address
	 * look in cache first, otherwise get from Yahoo
	 * 
	 * @param string $address
	 * @return array GeoCode information
	 */
	function getGeocode($address) {
		if(empty($address))
			return false;
		$_geocode = false;  
		if(($_geocode = $this->getCache($address)) === false) {
			if(($_geocode = $this->geoGetCoords($address)) !== false) {
				$this->putCache($address, $_geocode['lon'], $_geocode['lat']);
			}
		}
		return $_geocode;
	}
	
	/**
	 * get the geocode lat/lon points from cache for given address
	 * 
	 * @param string $address
	 * @return bool|array False if no cache, array of data if has cache
	 */
	function getCache($address) {		
		$_ret = array();
		
		$this->CI = &get_instance();
		
		$this->CI->load->database();
		
		$_res = $this->CI->db->select('lat,lng')->from($this->_db_cache_table)->where('query', strtolower($address))->get();
		
		$_row = $_res->row_array();

		if(isset($_row['lat']) && isset($_row['lng'])) {			
			$_ret['lat'] = $_row['lat'];
			$_ret['lon'] = $_row['lng'];
		}
		
		return !empty($_ret) ? $_ret : false;
	}
	
	/**
	 * put the geocode lat/lon points into cache for given address
	 * 
	 * @param string $address
	 * @param string $lon the map latitude (horizontal)
	 * @param string $lat the map latitude (vertical)
	 * @return bool Status of put cache request
	 */
	function putCache($address, $lon, $lat) {
		if((strlen($address) == 0 || strlen($lon) == 0 || strlen($lat) == 0)) return false;
		
		$_address = trim(strtolower($address));
		
		$data = array(
					'query' => $_address,
					'lat' => $lat,
					'lng' => $lon
					);
					
		$this->CI = &get_instance();
		
		$this->CI->load->database();

		$this->CI->db->insert('geocode_cache',$data);
		
		return true;		
	}
	
	/**
	 * get geocode lat/lon points for given address from Yahoo
	 * 
	 * @param string $address
	 * @return bool|array false if can't be geocoded, array or geocdoes if successful
	 */
	function geoGetCoords($address,$depth=0) {
		switch($this->lookup_service) {
			case 'GOOGLE':
				$_url = sprintf('http://%s/maps/api/geocode/json?sensor=%s&address=%s',$this->lookup_server['GOOGLE'], $this->mobile==true?"true":"false", rawurlencode($address));
				$_result = false;
				if($_result = $this->fetchURL($_url)) {
					$_result_parts = json_decode($_result);
					if($_result_parts->status!="OK"){
						return false;
					}
					$_coords['lat'] = $_result_parts->results[0]->geometry->location->lat;
					$_coords['lon'] = $_result_parts->results[0]->geometry->location->lng;
				}
				break;
			case 'YAHOO':
			default:		
				$_url = 'http://%s/MapsService/V1/geocode';
				$_url .= sprintf('?appid=%s&location=%s',$this->lookup_server['YAHOO'],$this->app_id,rawurlencode($address));
				$_result = false;
				if($_result = $this->fetchURL($_url)) {
					preg_match('!<Latitude>(.*)</Latitude><Longitude>(.*)</Longitude>!U', $_result, $_match);
					$_coords['lon'] = $_match[2];
					$_coords['lat'] = $_match[1];
				}
				break;
		}		 
		return $_coords;		
	}
	
	/**
	 * get full geocode information for given address from Google
	 * NOTE: This does not use the getCache function as there is 
	 * a lot of data in a full geocode response to cache.
	 * 
	 * @param string $address
	 * @return bool|array false if can't be geocoded, array or geocdoes if successful
	 */
	function geoGetCoordsFull($address,$depth=0) {
		switch($this->lookup_service) {
			case 'GOOGLE':
				$_url = sprintf('http://%s/maps/api/geocode/json?sensor=%s&address=%s',$this->lookup_server['GOOGLE'], $this->mobile==true?"true":"false", rawurlencode($address));
				$_result = false;
				if($_result = $this->fetchURL($_url)) {
					return json_decode($_result);
				}
				break;
			case 'YAHOO':
			default:		
				$_url = 'http://%s/MapsService/V1/geocode';
				$_url .= sprintf('?appid=%s&location=%s',$this->lookup_server['YAHOO'],$this->app_id,rawurlencode($address));
				$_result = false;
				if($_result = $this->fetchURL($_url)) {
					return $_match;
				}
				break;
		}		 
	}	

	/**
	 * fetch a URL. Override this method to change the way URLs are fetched.
	 * 
	 * @param string $url
	 */
	function fetchURL($url) {

		return file_get_contents($url);

	}

	/**
	 * get distance between to geocoords using great circle distance formula
	 * 
	 * @param float $lat1
	 * @param float $lat2
	 * @param float $lon1
	 * @param float $lon2
	 * @param float $unit	M=miles, K=kilometers, N=nautical miles, I=inches, F=feet
	 * @return float
	 */
	function geoGetDistance($lat1,$lon1,$lat2,$lon2,$unit='M') {
		
	  // calculate miles
	  $M =  69.09 * rad2deg(acos(sin(deg2rad($lat1)) * sin(deg2rad($lat2)) +  cos(deg2rad($lat1)) * cos(deg2rad($lat2)) * cos(deg2rad($lon1 - $lon2)))); 

	  switch(strtoupper($unit))
	  {
		case 'K':
		  // kilometers
		  return $M * 1.609344;
		  break;
		case 'N':
		  // nautical miles
		  return $M * 0.868976242;
		  break;
		case 'F':
		  // feet
		  return $M * 5280;
		  break;			
		case 'I':
		  // inches
		  return $M * 63360;
		  break;			
		case 'M':
		default:
		  // miles
		  return $M;
		  break;
	  }
	  
	}	
	
}

?>